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v The management module can turn off the blade server.
Understanding the control panel and LEDs
This section describes the controls and LEDs on the BladeCenter HS20 blade
server.
Note: The control panel door is shown in the closed (normal) position in the
Keyboard/mouse/video (KVM) select button: Press this button to associate the
shared BladeCenter unit keyboard port, mouse port, and video port with the blade
server. The LED on this button flashes while the request is being processed then is
lit when the ownership of the keyboard, mouse, and video has been transferred to
the blade server. It can take approximately 20 seconds to switch the keyboard,
video, and mouse control to the blade server.
You can also press keyboard keys in the following sequence to switch
keyboard/mouse/video control between blade servers:
Although the keyboard that is attached to the BladeCenter unit is a PS/2
keyboard, internal communication with it is through the USB. The operating system
in the blade server must provide USB support for the blade server to recognize and
use the keyboard and mouse. When you are not running an operating system that
has USB device drivers, such as in the following situations, the keyboard responds
very slowly:
v Running the blade server integrated diagnostics
v Running a BIOS update diskette on a blade server
v Updating the diagnostics on a blade server
v Running the Broadcom firmware CD for a blade server
If there is no response when you press the keyboard/mouse/video select button,
you can use the management-module Web interface to determine whether local
control has been disabled on the blade server.
12
Eserver BladeCenter HS20 Type 8843: Installation and User's Guide
following illustration. To access the power-control button, you must open the
control panel door.
Keyboard/mouse/video
select button
NumLock NumLock blade_server_number Enter
Where blade_server_number is the two-digit number for the blade bay in which
the blade server is installed.
CD/diskette/USB
select button
Activity LED
Location LED
Information LED
Blade-error LED
Power-control button
Power-on LED
®
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